﻿<!DOCTYPE html>
<html>
<head>
    <title>ÒÆ³ýCSSÀà±ð</title>
    <script src="jquery.min.js">
    </script>
    <script>
        $(document).ready(function () {
            $("button").click(function () {
                $("p,h1").removeClass("head intro main");
            });
        });
    </script>
    <style type="text/css">
        .head {
            font-size: 2em;
            color: green;
        }

        .intro {
            font-size: 120%;
            color: red;
        }

        .main {
            font-size: 20px;
            color: blue;
        }
    </style>
</head>
<body>
    <h1 class="head">´ºÏþ</h1>
    <p class="intro">´ºÃß²»¾õÏþ£¬</p>
    <p class="main">´¦´¦ÎÅÌäÄñ¡£</p>
    <button>ÒÆ³ýÑ¡ÔñÔªËØµÄCSSÀà</button>
</body>
</html>
